Submission #1151214

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151214		alexdd	Unscrambling a Messy Bug (IOI16_messy)	C++20	20 / 100	1 ms	580 KiB

messy

#include "messy.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> brut(int n)
{
    for(int i=1;i<=n;i++)
    {
        string s="";
        for(int j=0;j<i;j++)
            s.push_back('1');
        for(int j=0;j<n-i;j++)
            s.push_back('0');
        add_element(s);
    }

    compile_set();

    string cur="";
    for(int i=0;i<n;i++)
        cur.push_back('0');
    vector<int> perm(n);
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<n;j++)
        {
            if(cur[j]=='0')
            {
                cur[j]='1';
                if(check_element(cur))
                {
                    perm[j]=i;
                    break;
                }
                cur[j]='0';
            }
        }
    }
    return perm;
}
std::vector<int> restore_permutation(int n, int w, int r)
{
    if(n==8) return brut(n);

    int cntb=0;
    while((1<<cntb)<=n)
        cntb++;

    for(int i=0;i<cntb;i++)
    {
        string s="";
        for(int j=0;j<=i;j++)
            s.push_back('1');
        for(int j=0;j<n-i-1;j++)
            s.push_back('0');
        add_element(s);
    }
    for(int i=cntb;i<n;i++)
    {
        string pref="";
        for(int j=0;j<cntb;j++)
        {
            if((1<<j)&i) pref.push_back('1');
            else pref.push_back('0');
        }
        string suff="";
        for(int j=cntb;j<n;j++)
        {
            if(j==i) suff.push_back('0');
            else suff.push_back('1');
        }
        add_element(pref+suff);
        for(int j=cntb-1;j>=0;j--)
        {
            if(pref[j]=='1')
            {
                pref[j]='0';
                add_element(pref+suff);
            }
        }
    }

    compile_set();

    string cur="";
    for(int i=0;i<n;i++)
        cur.push_back('0');
    vector<int> mici(cntb),sol(n);
    vector<bool> ismic(n,0);
    for(int i=0;i<cntb;i++)
    {
        for(int j=0;j<n;j++)
        {
            if(cur[j]=='0')
            {
                cur[j]='1';
                if(check_element(cur))
                {
                    mici[i]=j;
                    sol[j]=i;
                    ismic[j]=1;
                    //cout<<i<<" "<<j<<"  mic\n";
                    break;
                }
                cur[j]='0';
            }
        }
    }
    for(int i=cntb;i<n;i++)
    {
        string s="";
        int cur=cntb;
        for(int j=0;j<n;j++)
        {
            if(ismic[j]) s.push_back('0');
            else
            {
                if(cur==i) s.push_back('0');
                else s.push_back('1');
                cur++;
            }
        }
        assert(check_element(s));
        int sum=0;
        for(int j=0;j<cntb;j++)
        {
            s[mici[j]]='1';
            if(check_element(s))
            {
                sum += (1<<j);
            }
            else
                s[mici[j]]='0';
        }
        //cerr<<i<<" "<<sum<<" zzz\n";
        sol[sum]=i;
    }
    return sol;
}
/*

4 16 16
2 1 3 0


*/

Compilation message (stderr)

messy.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
messy_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 18
• Subtask 3: 0 / 11
• Subtask 4: 0 / 21
• Subtask 5: 0 / 30